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The OpenStack Infra team runs one of the world's largest Open Source CI/CD systems in service of OpenStack's early decision to mandate that all merges only be performed by automation if and only if all tests pass.

Zuul is the engine developed to handle this, but it is not OpenStack specific. With the rise of microservices and kubernetes, the number of multi-repo projects is increasing, as is the need for CI systems that understand them. The most recent version of Zuul has been reworked to make it easy for other people, communities or organizations to harness its power regardless of any relationship with OpenStack.

We'll talk about the things that make Zuul special - multi-repository dependencies, optimistic branch prediction and deep Ansible integration. And we'll walk through how to get started with a private or a public Zuul.